duh...image_dimensions_scale().....i thought this was testing a class...but it is for a function:/
we need to do something with image.inc
i think it should be a service since it needs the image.toolkit service
and while we are at it convert the tests to phpunit as well

How about moving more of the functions though from image.inc to this component?
and then turn the imageScaleUnitTests to just ImageTest, that unit tests each of its methods? something similar like String and Unicode:)

I guess we can leave functions depending on image.toolkit service out for now, or introduce a method setImageToolkit, where we inject the toolkit right after the container is built